public class Demo1_If {
    public static void main(String[] args) {
        int age = 17;

        if (age >= 18) {
            System.out.println("可以浏览本网站");
        }

        if (true)
            System.out.println("---");
        System.out.println("执行了");
        System.out.println("完了");
    }
}
